68133979 has 2 divisors, whose sum is σ = 68133980. Its totient is φ = 68133978.

The previous prime is 68133941. The next prime is 68134037. The reversal of 68133979 is 97933186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68133979 - 2¹³ = 68125787 is a prime.

It is not a weakly prime, because it can be changed into another prime (68133179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34066989 + 34066990.

It is an arithmetic number, because the mean of its divisors is an integer number (34066990).

Almost surely, 2^68133979 is an apocalyptic number.

68133979 is a deficient number, since it is larger than the sum of its proper divisors (1).

68133979 is an equidigital number, since it uses as much as digits as its factorization.

68133979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 68133979 is about 8254.3309238242. The cubic root of 68133979 is about 408.4334010292.

The spelling of 68133979 in words is "sixty-eight million, one hundred thirty-three thousand, nine hundred seventy-nine".